Physiological locking involves
Correct Answer: Internal rotation of femur over stabilized tibia
Description: A i.e. Internal rotation of femur over stabilized tibia Physiological locking occurs in last 30 degree of extension, when femur rotates medially (internally) over stabilized tibiaQ. This very stable position is caused by quadriceps femoris muscle. Unlocking needed to initiate flexion is carried out by popliteus muscle, which moves femur laterally on stabilized tibia.
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